CN112615707B

CN112615707B - Method for transmitting uplink control information

Info

Publication number: CN112615707B
Application number: CN202110064742.0A
Authority: CN
Inventors: 李迎阳; 王轶; 付景兴; 张世昌
Original assignee: Samsung Electronics Co Ltd
Current assignee: Samsung Electronics Co Ltd
Priority date: 2015-06-19
Filing date: 2015-10-15
Publication date: 2024-04-23
Anticipated expiration: 2035-10-15
Also published as: CN112615707A; US20230076577A1; US11864184B2; WO2016204585A1

Abstract

The application discloses a method for transmitting uplink control information. The method comprises the following steps: a user terminal (UE) receives configuration information for Uplink Control Information (UCI), including determining a period-channel state information (P-CSI) period to be fed back in one subframe, an offset, and a corresponding Physical Uplink Control Channel (PUCCH), and also including configuration information for hybrid automatic repeat request-acknowledgement (HARQ-ACK) transmission; the UE processes one or more UCI information in one subframe and transmits UCI information on resources of one PUCCH format. By adopting the method of the application, the transmission power of UCI is optimized on the channel of PUCCH format, and when P-CSI is transmitted, PUCCH resources which are determined to be most suitable for P-CSI transmission are provided, thereby improving the utilization rate of uplink resources.

Description

Method for transmitting uplink control information

The application is a divisional application of an application patent application with the application date of 2015, 10, 15, the application number of 201510666982.2 and the application name of a method for transmitting uplink control information.

Technical Field

The present invention relates to a wireless communication system, and more particularly, to a method of transmitting uplink control information.

Background

In the LTE system, a greater operating bandwidth is obtained by combining a plurality of element carriers (CCs), and downlink and uplink, i.e., carrier Aggregation (CA), techniques constituting a communication system support a higher transmission rate. Up to now, various types of CA have been supported, namely: the aggregated cells may be FDD cells, TDD cells with the same TDD uplink and downlink configuration, or TDD cells with different TDD uplink and downlink configurations. In addition, aggregation of FDD cells and TDD cells is supported, and uplink and downlink configuration of TDD cells may be semi-static configuration or dynamic change. For one UE, when CA mode is configured, one cell is a primary cell (Pcell) and the other cells are called secondary cells (scells). According to the LTE method, downlink data is transmitted based on a hybrid automatic repeat request (HARQ) mechanism for each cell, and accordingly, a user terminal (UE) needs to feed back hybrid automatic repeat request-acknowledgement (HARQ-ACK) information of a plurality of cells. Accordingly, the UE needs to feed back CSI information of a plurality of cells.

In LTE systems, physical Uplink Control Channel (PUCCH) format 3 is currently supported, the basic idea being to jointly encode and map multiple HARQ-ACK bits, e.g. from multiple configured cells, to physical channel transmissions. PUCCH format 3 can support transmission of 22 bits at maximum. According to the LTE method, when Uplink Control Information (UCI) needs to be fed back on a Physical Uplink Shared Channel (PUSCH), different processing methods are adopted for different types of UCI. Fig. 1 is a schematic diagram of multiplexing HARQ-ACK, rank Indication (RI), and Channel Quality Indication (CQI)/Precoding Matrix Indication (PMI) on PUSCH. Wherein: after coding and rate matching, the CQI/PMI information is mapped by adopting a time-first method, which is the same as the mapping method of uplink data. The HARQ-ACK information is transmitted on 4 symbols mapped beside the DMRS and adopts frequency direction mapping opposite to CQI/PMI, so that when the number of Resource Elements (REs) required to be occupied by the HARQ-ACK information is more, the HARQ-ACK information can cover the REs occupied by the CQI/PMI, thereby protecting the HARQ-ACK information with higher importance. Similar to the HARQ-ACK information, the RI information is mapped to symbols beside the HARQ-ACK information, and frequency direction mapping opposite to the CQI/PMI is also adopted, so that when the number of REs occupied by the RI information is greater, the RI information can cover REs occupied by the CQI/PMI, thereby protecting the RI information with higher importance.

According to the existing LTE specification, periodic CSI (P-CSI) feedback is realized by respectively configuring the period and subframe offset of the P-CSI and occupied PUCCH channels of each cell; for a cell configured with multiple CSI processes, the P-CSI configuration period and subframe offset for each CSI process are supported, respectively, but the same PUCCH channel is used for all CSI processes of the same cell. Thus, when multiple pieces of P-CSI information need to be sent in one subframe, according to the priority of the P-CSI, the UE only sends the P-CSI with the highest priority, namely, directly discards other P-CSI with low priority. In the existing LTE specifications, parameters for prioritizing P-CSI are respectively in order of their priority levels from high to low: CSI report type, CSI process ID, cell ID, and CSI subframe set index. Specifically, firstly, the CSI report types are compared, the CSI process IDs are compared when the CSI report types are the same, the cell IDs are compared when the CSI process IDs are the same, and the CSI subframe set indexes are compared when the cell IDs are the same.

According to the existing LTE specifications, the transmission power of the PUCCH channel in subframe i of cell c is determined according to the following equation:

The definition of each parameter in the formula is detailed in chapter 5.1.2.1 of 3GPP specification 36.212, and the description is as follows: p _CMAX,c (i) is the maximum transmission power on cell c of the configured UE; Δ _{F_PUCCH} (F) is the power offset relative to the reference format (in LTE the reference format is PUCCH format 1 a); Δ _TxD (F') is a parameter related to PUCCH format and whether transmit diversity is employed; PL _c is link loss; p _{O_PUCCH} is the power offset value of the higher layer signaling configuration; g (i) is the accumulated value of the closed loop power control; h (n _CQI,n_HARQ,n_SR) is a power offset, related to the PUCCH format and related to the number of UCI bits to be fed back, n _CQI is the number of bits of CSI to be fed back in subframe i, n _SR is the number of SR bits to be fed back in subframe i, and takes on a value of 0 or 1, n _HARQ is the number of bits of the effective HARQ-ACK to be actually fed back in subframe i. For PUCCH format 3, for example, when feedback CSI is required,

The 3GPP standardization organization is currently working on standardization of enhanced CA technology for aggregating more cells, e.g. the number of aggregated cells may reach 32. In this case, it is possible for one UE to divide all the cells to be configured into a plurality of groups, or to have only one group; and for each group, feedback UCI information on PUCCH of one cell, respectively, and the cell feeding back UCI information is similar to Pcell in the prior art CA. Here, the number of cells per group may still exceed the maximum number of aggregated cells supported by the existing CA technology. Since the number of cells requiring feedback of UCI information on the PUCCH of one cell increases, it necessarily results in an increase in HARQ-ACK information and CSI information requiring feedback on the PUCCH, for example, more than 22 bits. In practice, UCI information transmitted in an uplink direction by a UE may also include a Scheduling Request (SR), and CSI is further divided into P-CSI and aperiodic CSI (a-CSI). Accordingly, in order to support UCI transmission exceeding 22 bits, a new PUCCH format needs to be defined. This format may be entirely new or may be derived based on existing PUCCH format 3, PUSCH or other channel structures, hereinafter collectively referred to as PUCCH format X. Since PUCCH format X is introduced, a series of effects are necessarily brought, and a specific transmission method for UCI is accordingly required to be designed.

Disclosure of Invention

The application provides a method for transmitting uplink control information. The technical scheme of the application is as follows:

A method of transmitting uplink control information, comprising:

The UE receives configuration information of Uplink Control Information (UCI), including determining a P-CSI period, an offset and a corresponding Physical Uplink Control Channel (PUCCH) to be fed back in one subframe, and also including configuration information of hybrid automatic repeat request-acknowledgement (HARQ-ACK) transmission;

the UE processes one or more UCI information in one subframe and transmits UCI information on resources of one PUCCH format.

By adopting the mode of the invention, the transmission power of UCI is optimized on the channel of the PUCCH format, and the PUCCH resource which is determined to be most suitable for P-CSI transmission is provided when P-CSI is transmitted, thereby improving the utilization rate of uplink resources.

Drawings

Fig. 1 is a schematic diagram of mapping UCI of an LTE system on PUSCH;

fig. 2 is a flowchart illustrating a method for transmitting UCI information on a PUCCH format X channel according to the present invention;

FIG. 3 is a schematic diagram of UCI independent coding mapping for different classes;

Fig. 4 is a block diagram of an apparatus for transmitting uplink control information according to the present invention.

Detailed Description

The present application will be described in further detail with reference to the accompanying drawings, in order to make the objects, technical means and advantages of the present application more apparent.

For one UE, UCI information of all cells may be fed back on PUCCH of Pcell. Or the cells configured by the UE may be divided into a plurality of groups, and UCI information is fed back on the PUCCH of one cell for each group of cells, respectively. Each group of cells forms a PUCCH Cell Group (CG). Here, UCI of PUCCH CG where the Pcell is located is fed back on the Pcell. The present invention describes a method of transmitting UCI on PUCCH of one cell, which can be directly applied to each PUCCH CG of a UE.

In the LTE system, UCI may be classified into various types, i.e., HARQ-ACK, SR, P-CSI, and a-CSI. In one uplink subframe, the UE may need to feed back one, more than one, or all of the UCI types at the same time. The CSI information is further divided into two types, one is information with high reliability requirement, for example, RI; the other is information with relatively low reliability requirements, e.g., CQI/PMI. The CSI information with higher reliability requirement is referred to as a first type CSI information, and the CSI information with lower reliability requirement is referred to as a second type CSI information, namely: the first type of CSI information has a higher reliability requirement than the second type of CSI information.

In order to support feedback of more UCI information on PUCCH within one subframe, the LTE system needs to introduce at least one new PUCCH format, which can support a larger payload. This format may be entirely new or may be derived based on existing PUCCH format 3, PUSCH or other channel structures, hereinafter collectively referred to as PUCCH format X.

As shown in fig. 2, a flowchart of a method of transmitting UCI information on a PUCCH format X channel according to the present invention includes the steps of:

Step 201: the UE receives configuration information for UCI including determining a P-CSI period, an offset, and a corresponding PUCCH channel to be fed back in one subframe, and also includes configuration information for HARQ-ACK transmission.

Step 202: the UE processes one or more UCI information within one subframe and transmits the UCI information on the PUCCH channel.

The present invention will be described in detail with reference to specific examples.

Example 1

In existing LTE systems, one PUCCH format is dedicated to one function, and accordingly the power control parameter is unique to one PUCCH format. For example, PUCCH format 2 is dedicated to transmitting P-CSI, thereby setting uplink transmission power according to the performance requirement of P-CSI; PUCCH format 3 is used for transmitting UCI information including at least HARQ-ACK, and since HARQ-ACK is necessarily present, uplink transmission power is set according to HARQ-ACK.

In order to support larger payloads, LTE systems need to introduce PUCCH format X. The PUCCH format X channel may carry various types of UCI information, i.e., may be used to perform various functions. In addition, in case that the total bit number limit does not exceed 22 bits, PUCCH format 3 may also be used to carry various types of UCI information, i.e., may be used to accomplish various functions. Specifically, for PUCCH format X and format 3, HARQ-ACK information only, P-CSI information only, or both UCI types, i.e., HARQ-ACK and P-CSI information, may be carried. The conditions of carrying P-CSI can be divided into P-CSI information only carrying RI, P-CSI information only carrying CQI/PMI and P-CSI information simultaneously carrying RI and CQI/PMI. Generally, the performance requirements of different types of UCI are different, which results in that the settings of their power control parameters also need to be different. For convenience of description, PUCCH format X and PUCCH format 3 will be hereinafter collectively referred to as PUCCH format Y.

According to the above analysis, different types of UCI information may be carried for one PUCCH format Y. The invention provides a method for respectively configuring corresponding uplink power control parameters according to different UCI types carried by a PUCCH format Y. For example, it may be that parameters of corresponding uplink power control are respectively configured for each type and combination of types of UCI transmitted on PUCCH format Y. Or the UCI may be divided into fewer cases, and corresponding uplink power control parameters may be configured for each case, so as to reduce signaling overhead. For example, it may be possible to distinguish between a case where only P-CSI is carried and a case where at least HARQ-ACK is carried. Or the conditions of carrying only the P-CSI information such as CQI/PMI and carrying at least the HARQ-ACK and/or RI can be divided according to UCI reliability requirements, and the parameters of uplink power control are respectively configured for the two conditions. Or the method can be divided into a case of carrying only the P-CSI information such as CQI/PMI, a case of carrying RI but including HARQ-ACK and a case of carrying at least HARQ-ACK, and correspondingly configuring the parameters of the uplink power control of the three cases.

For one PUCCH format Y, the corresponding coding rate is different depending on the number of bits of the payload it carries. The variation in the encoding rate necessarily causes a difference in decoding performance. In this way, for one PUCCH format Y, the payload size carried by the PUCCH format Y may be divided into a plurality of intervals, and the parameters for uplink power control may be configured for each payload interval accordingly.

To support larger payloads, one possible approach is to support feedback of UCI information using a modulation scheme of 16QAM. Namely, according to the link state of the UE, the UE with better link can be configured to adopt 16QAM; while for other UEs, QPSK is still employed. Because of the different modulation schemes, the link performance is different. For example, the configuration of 16QAM may be related to the size of UCI payload, i.e. when the number of bits of UCI exceeds a certain threshold value, implicitly indicating that 16QAM is employed. Or 16QAM can be selected and used according to UCI type, for example, the 16QAM is configured and used for the case of carrying only the P-CSI information such as CQI/PMI; whereas for the case where HARQ-ACK and/or RI are carried, QPSK is used for configuration. In this way, for one PUCCH format Y, the parameters for uplink power control are configured accordingly according to the modulation scheme used.

In order to support larger payloads, it is also possible to increase the number of PRBs occupied by the channel of the PUCCH format, thereby effectively still reducing the coding rate. In this way, for one PUCCH format Y, the parameters for uplink power control are respectively configured according to the number of PRBs allocated to the UE.

Some conditions for triggering parameters for respectively configuring uplink power control, namely, different types of UCI, different payload intervals, different modulation modes and change of PRB occupation number of a PUCCH format Y channel, are described above. The parameters of uplink power control may be configured for one PUCCH format Y according to one of the conditions described above, and for different cases of such conditions. Or for one PUCCH format Y, the parameters for uplink power control may be configured according to a combination of the above-mentioned multiple conditions and for a combination of different situations of the multiple conditions.

A method for processing uplink power control is to process power control of a PUCCH format Y based on the existing standard PUCCH power control method.

The definition of each parameter in the formula (1) is detailed in chapter 5.1.2.1 of 3GPP specification 36.212, and the description is as follows: p _CMAX,c (i) is the maximum transmission power on cell c of the configured UE; Δ _{F_PUCCH} (F) is the power offset relative to the reference format (in LTE the reference format is PUCCH format 1 a); Δ _TxD (F') is a parameter related to PUCCH format and whether transmit diversity is employed; PL _c is link loss; p _{O_PUCCH} is the power offset value of the higher layer signaling configuration; g (i) is the accumulated value of the closed loop power control; h (n _CQI,n_HARQ,n_SR) is a power offset, related to a PUCCH format, and related to the number of UCI bits that need feedback; n _CQI is the number of bits of CSI to be fed back in subframe i; n _SR is the SR bit number to be fed back in subframe i, and the value is 0 or 1; n _HARQ is the number of bits of the effective HARQ-ACK to be actually fed back in subframe i.

Among the above-described power control parameters of the PUCCH, P _CMAX,c(i)、PL_c、P_{O_PUCCH} and g (i) are common parameters, irrespective of a specific PUCCH format, and parameters Δ _TxD(F')、Δ_{F_PUCCH} (F) and h (n _CQI,n_HARQ,n_SR) are related to the PUCCH format. Specifically, for the above PUCCH format Y, for the different situations of the above one condition, or for the combination of the different situations of the above multiple conditions, the first method to configure the parameters of the uplink power control is to configure the parameters Δ _{F_PUCCH} (F) separately, so that the value of Δ _{F_PUCCH} (F) may be different, and keep the other parameters still configured with unique values. Or for the above-mentioned one PUCCH format Y, for the different situations of the above-mentioned one condition, or for the different combinations of the different situations of the above-mentioned multiple conditions, the second method of configuring the parameters of its uplink power control is to configure different parameters h (n _CQI,n_HARQ,n_SR) respectively, and keep the other parameters still configured with unique values. Or for the PUCCH format Y, for the different situations of the above condition, or for the combination of the different situations of the above conditions, the third method of configuring the parameters of the uplink power control is to configure different parameters h (n _CQI,n_HARQ,n_SR) and configure parameters Δ _{F_PUCCH} (F) respectively, so that the values of Δ _{F_PUCCH} (F) may also be different, and keep the other parameters still configured with unique values. The parameter Δ _TxD (F ') is a parameter related to transmit diversity, and may be a parameter whose value Δ _TxD (F') is unique to one of the PUCCH formats Y, or may be further configured with a parameter Δ _TxD (F ') based on the three methods of configuring the parameters for uplink power control thereof, respectively, so that the value of Δ _TxD (F') may be different.

Here, the parameter h (n _CQI,n_HARQ,n_SR) may be a value representing the power offset calculated according to the number of bits of HARQ-ACK, P-CSI and SR, and its functional form may be different under different conditions and condition combinations, thereby satisfying the requirement of link performance. h (n _CQI,n_HARQ,n_SR) may also be a function of the number of bits of various UCI types and other parameters, for example, the number of modulation symbols actually occupied by each UCI type or the total number of modulation symbols of PUCCH format Y. That is, h (n _CQI,n_HARQ,n_SR) can be calculated based on the number of bits and the number of occupied modulation symbols of one UCI type, e.g., the number of occupied modulation symbols of HARQ-ACK and SR is recorded asThen/>Or h (n _CQI,n_HARQ,n_SR) can be calculated according to the bit number of various UCIs and the corresponding modulation symbol number, for example, the modulation symbol number occupied by CSI is recorded as/>Then/>Alternatively, the power offset h (n _CQI,n_HARQ,n_SR) may be calculated according to the number of bits and the total number of modulation symbols of the UCI of each type, and h (n _CQI,n_HARQ,n_SR)＝f((n_CQI+n_HARQ+n_SR)/N_RE). The invention is not limited to the specific functional form of the parameters h (n _CQI,n_HARQ,n_SR) and f (x).

In addition, for the above-mentioned PUCCH format Y, for the different situations of the above-mentioned one condition, or for the different situations of the above-mentioned multiple conditions, the parameters P _{O_PUCCH} may be configured separately, so that the value of P _{O_PUCCH} may be different, so as to adapt to the power control requirements under different situations. With this approach, P _{O_PUCCH} is no longer a common parameter independent of PUCCH format. Here, the different case of the above one condition, or the combination of the different cases of the above multiple conditions may be that only the parameter P _{O_PUCCH} in the PUCCH power control formula is supported to be changed, or may be that the parameter P _{O_PUCCH} is changed while the other power control reference parameters Δ _{F_PUCCH}(F)、h(n_CQI,n_HARQ,n_SR) and/or Δ _TxD (F') are further changed.

In addition, the method of setting the parameters of uplink power control for the number of PRBs occupied by the channel according to the PUCCH format Y may be a method of introducing a term M _PRB (i) reflecting the influence of the number of PRBs into the PUCCH-based power control formula (1), for example:

the present invention is not limited to this method, whether to further change other power control reference parameters P _{O_PUCCH}、Δ_{F_PUCCH}(F)、h(n_CQI,n_HARQ,n_SR) and/or Δ _TxD (F') according to the number of PRBs.

The method of setting the parameters of the uplink power control according to the modulation scheme of the PUCCH format Y may be a method of introducing a term Δ _MOD (F ") reflecting the influence of the modulation scheme into the PUCCH power control based formula. That is, Δ _MOD (F ") is arranged corresponding to QPSK and 16QAM, respectively, and thus different values can be adopted. For example, the number of the cells to be processed,

The invention is not limited to this method, whether to further vary the other power control reference parameters P _{O_PUCCH}、Δ_{F_PUCCH}(F)、h(n_CQI,n_HARQ,n_SR) and/or Δ _TxD (F') according to the modulation scheme.

Another method for processing uplink power control is to process power control on PUCCH format Y based on the existing standard PUSCH power control method.

According to the existing LTE specifications, when there is no PUCCH transmission, the transmission power of the PUSCH channel in subframe i of cell c is determined according to the following equation:

The definition of each parameter in the formula (4) is detailed in chapter 5.1.1.1 of 3GPP specification 36.212, and is described as follows: p _CMAX,c (i) is the maximum transmission power on cell c of the configured UE; m _PUSCH,c (i) is the number of PRBs occupied by PUSCH; p _{O_PUSCH,c} (j) is the power offset value of the higher layer signaling configuration; PL _c is link loss; α _c (j) is all or part of the control compensating link loss; f _c (i) is the accumulated value of the closed loop power control; Δ _TF,c (i) is a parameter related to the MCS of the uplink transmission. In particular, when the parameter K _S is equal to 1.25, For the case of transmitting only a-CSI without uplink data, bpre=o _CQI/N_RE,/>For the case where uplink data is transmitted,C is the number of CBs divided by one TB, K _r is the bit number of the (r) th CB, and N _RE is the total number of REs contained in the PUSCH.

When the above-described PUSCH power control formula is used for PUCCH power control, that is,

Here, α _c (j) may be set to 1, so as to be consistent with a general PUCCH power control processing method. f _c (i) needs to be changed to be PUCCH-based TPC command processing.

M _PUSCH,c (i) is the number of PRBs occupied by the PUCCH format Y channel. When only one PUCCH format Y channel is allocated in one subframe, UCI may be transmitted by occupying the PUCCH format Y channel, and M _PUSCH,c (i) is the number of PRBs of the PUCCH format Y channel; when multiple UCI needs to be fed back in one subframe and multiple PUCCH format Y channels are configured correspondingly, only one PUCCH format Y channel is occupied to transmit the multiple UCI, and then M _PUSCH,c (i) is the number of PRBs of the PUCCH format Y channel; or, UCI may be transmitted simultaneously using PRBs of a plurality of PUCCH format Y channels, for example, UCI is transmitted on all PRBs of the plurality of PUCCH format Y channels in accordance with a PUSCH structure, and M _PUSCH,c (i) is a sum of PRB numbers of the plurality of PUCCH format X channels. For example, when the PRBs of two PUCCH format Y channels are discontinuous, the PUSCH channel is equivalent to a PUSCH channel containing two clusters of PRBs, where each cluster of PRBs corresponds to one PUCCH format Y channel.

If the value of P _{O_PUSCH,c} (j) set for uplink data transmission on the PUSCH does not meet the requirement of the PUCCH, the parameter P _{O_PUSCH,c} (j) for power control of the PUCCH can be additionally configured by using high-layer signaling, so that the value of the parameter P _{O_PUSCH,c} (j) can be different from the power control parameter of the general PUSCH. In particular, the range of values of the parameter P _{O_PUSCH,c} (j) for PUCCH power control may be different from PUSCH power control. Here, the same value of the parameter P _{O_PUSCH,c} (j) may be configured for all cases where the PUCCH format Y is applied. Or according to the above analysis, since the performance requirements of different types of UCI are different, which results in that the setting of its power control parameters also needs to be different, and accordingly, the parameters P _{O_PUSCH,c} (j) may be respectively configured according to the difference of UCI types carried by the PUCCH format Y. Thus, P _{O_PUSCH,c} (j) may take different values depending on the UCI type of the bearer. Here, it may be that parameters of corresponding uplink power control are respectively configured for each type and combination of types of UCI. Or the UCI may be divided into fewer cases, and corresponding uplink power control parameters may be configured for each case, so as to reduce signaling overhead.

May be changed to be processed according to UCI fed back on PUCCH format Y. For example, bpre=n _UCI/N_RE calculated from the number of bits N _UCI of UCI. Here, N _RE is the total number of REs on the PRB for feedback UCI. When only one UCI type is fed back in PUCCH format Y, for example, P-CSI or HARQ-ACK, N _UCI is equal to the number of bits of this UCI, and the parameter/>, corresponding to this UCI type, is employedTo handle power control. When multiple UCI is fed back simultaneously, N _UCI may refer to the sum of the number of bits of the various UCI types that need to be fed back simultaneously in one subframe, and use the parameter/>, of one UCI type of the multiple UCI typesFor example, the reliability of the UCI types with highest requirements is the parameter/>To handle power control. Or may be obtained after processing the number of bits of various UCI types, for example, equivalently converting the respective UCI types into the same UCI type and calculating the sum of the number of bits, and employing the parameters/>, of such equivalent UCI typesTo handle power control, the present invention is not limited to a specific functional form of handling the number of bits of various UCI types. Or for multiple UCI types transmitted in one subframe, the method can also be according to the bit number n _m of one UCI m and the occupied modulation symbol number/>, wherein the bit number n _m is the same as the UCI mI.e./>Parameters/>, which may be and employ such UCITo handle power control. For example, the UCI m may be a UCI type having a higher reliability requirement among a plurality of UCI types transmitted in one subframe, such as HARQ-ACK. Δ _TF,c (i) can achieve the effect of adjusting transmission power according to UCI bit number, i.e., is equivalent to h (n _CQI,n_HARQ,n_SR) in PUCCH power control formula. Here, because the PUCCH format Y and the existing PUSCH channel cannot meet the performance requirement, and the interference scenario is different, the parameter Δ _TF,c (i) for the PUCCH format Y may be configured with higher layer signaling, so that its value may be different from that of the general PUSCH. For example, different parameters K _S for PUCCH power control are configured or predefined with higher layer signaling.

According to the above analysis, PUCCH format Y may carry different types of UCI information. Because the performance requirements of different types of UCI are different, this results in that the settings of its power control parameters also need to be different. In this way, according to the different UCI types carried by PUCCH format Y, the corresponding uplink power control parameters need to be configured respectively. This can be noted as Δ _UCI (i) by introducing a parameter related to the type of UCI it carries in equation (5), i.e

The parameters Δ _UCI (i) may be configured separately according to the difference in UCI type carried on the PUCCH format Y channel, and thus may take different values. Here, it may be that parameters of corresponding uplink power control are respectively configured for each type and combination of types of UCI. Or the UCI may be divided into fewer cases, and corresponding uplink power control parameters may be configured for each case, so as to reduce signaling overhead.

Example two

In order to support larger payloads, LTE systems need to introduce PUCCH format X. The PUCCH format X channel may carry various types of UCI information. In addition, in case that the total number of bits limit does not exceed 22 bits, PUCCH format 3 may also be used to carry multiple types of UCI information. For convenience of description, PUCCH format X and PUCCH format 3 will be hereinafter collectively referred to as PUCCH format Y.

For a PUCCH format Y channel, when multiple types of UCI needs to be carried, instead of differentiating UCI types, all UCI information may be jointly encoded, rate-matched, and modulated, and then mapped onto the PUCCH format Y channel. At this time, based on the UCI type with the highest reliability requirement of the current transmission, the uplink transmission power is calculated according to the total number of UCI bits. The UCI type power control formula with highest reliability requirement is recorded as P=f (x), x represents the bit number of UCI with highest reliability requirement, and the uplink transmission power of the UE isWhere N _i represents the number of bits of the i-th UCI type to be fed back in one subframe, and N _CRC is the number of CRC bits added for UCI transmission. The number of CRC bits may be 0, i.e. no CRC is added; or an integer greater than 0.

For example, by adopting the method of the first embodiment, according to the different UCI types carried by one PUCCH format Y, the corresponding uplink power control parameters are respectively configured. For example, for the case of carrying only the P-CSI information such as CQI/PMI, uplink power control is performed according to one set of parameters, and for the case of carrying at least HARQ-ACK and/or RI, uplink power control is performed using another set of parameters. Or for the case of P-CSI information, performing uplink power control according to one set of parameters, and for the case of at least carrying HARQ-ACK, performing uplink power control by adopting another set of parameters. Or further distinguishing the reliability requirements of HARQ-ACK and RI, and the minimum reliability requirements of the P-CSI information such as CQI/PMI, and executing uplink power control according to a first set of parameters under the condition of only carrying the P-CSI information such as CQI/PMI; performing uplink power control with a second set of parameters for the case that at least the UCI with the next highest reliability requirement is carried but the UCI with the highest reliability requirement is not included; and executing uplink power control by adopting a third set of parameters for the situation of carrying at least UCI with highest reliability requirement.

For a PUCCH format Y channel, when multiple types of UCI needs to be carried, UCI information may be classified first, and UCI of different classifications may be encoded, rate-matched, and modulated, respectively, and then mapped onto the PUCCH format Y channel. Here, each of the classified UCI is mapped onto only a part of the modulation symbols of the one PUCCH format Y channel, and the sum of the number of modulation symbols mapped by the respective classified UCI is equal to the total number of modulation symbols of the one PUCCH format Y channel. For example, HARQ-ACK and SR may be used as one type of UCI, and P-CSI may be used as another type of UCI; or may use HARQ-ACK as one type UCI and P-CSI and SR as another type UCI. Or the information with higher reliability requirement, including HARQ-ACK, SR and first-type CSI information, can be used as UCI; the second type of CSI information with lower reliability requirements is used as another type of UCI. The two UCI information types are recorded as UCI_1 and UCI_2, and the bit numbers are respectively N1 and N2. Or, UCI may be classified into 3 types, for example, HARQ-ACK and SR are used as UCI of one type, CSI of the first type is used as UCI of one type, and CSI of the second type is used as UCI of another type; or HARQ-ACK is used as one UCI, the first type of CSI information and SR are used as one UCI, and the second type of CSI information is used as the other UCI. The three UCI information types are UCI_1, UCI_2 and UCI_3, and the bit numbers are N1, N2 and N3.

A schematic diagram of dividing two types of UCI is shown in fig. 3. Because each type of UCI is respectively coded, rate matched, modulated and channel mapped, the two UCIs occupy respectivelyAnd/>Modulation symbol,/>And/>And is equal to the total number of modulation symbols of PUCCH format Y, α is an equivalent parameter of both types of UCI. Depending on the power control algorithm, α may have different setting methods. For example, α may be the number of bits used to equivalent different UCI types to the same type; or the transmission power ratio of two UCI types; or may refer to the ratio of the number of modulation symbols occupied by two types of UCI.

According to the above method for classifying UCI, when only one classified UCI needs to be fed back on PUCCH format Y, uplink transmission power can be determined directly according to the number of bits of such UCI. When it is required to simultaneously carry a plurality of classified UCI on the PUCCH format Y, the method of power control of the PUCCH format Y of the present invention is described below.

The first method is to equivalent UCI of all different classes to the same class, and calculate the total number of equivalent bits of the UCI, so as to perform power control according to the UCI requirement by using the total number of equivalent bits. Here, the transmission power of the UE may be calculated using the method of processing transmission power control based on, for example, equation 1), 2), 3), 5), or 6) in embodiment one. For example, assuming that UCI of PUCCH format Y is divided into two categories, which are denoted as first-type UCI and second-type UCI without loss of generality, and the second-type UCI is equivalent to the first-type UCI, the total number of bits of equivalent first-type UCI, n=n ₁+αN₂, where α is a coefficient equivalent to the second-type UCI as the first-type UCI, and α may be configured with higher-layer signaling or predefined. Or alpha is calculated according to other parameters, for example, parameters for calculating the number of modulation symbols when the UCI of the first type and the UCI of the second type are respectively configured and mapped to the PUSCH for transmissionDenoted as β ₁ and β ₂, respectively, α may be the ratio of β ₁ to β ₂, α=β ₂/β₁. The value of α may be calculated based on the difference in performance requirements of the first and second UCI types. Next, the UE uplink transmission power f (N) =f (N ₁+αN₂+N_CRC) may be calculated according to a power control formula f (N ₁) of the first UCI, where N ₁ represents the number of bits of the first UCI, and the equivalent total number of bits N. For example, suppose that UCI of PUCCH format Y is divided into three categories, which are denoted as first, second, and third types of UCI without loss of generality. When three classified UCI exists and the second and third UCI are equivalent to the first UCI, the equivalent total number of bits n=n ₁+αN₂+βN₃, where α and β are coefficients equivalent to the second and third UCI as the first UCI, respectively, and α and β may be configured with higher layer signaling or predefined. Or alpha and beta are calculated according to other parameters, for example, parameters/>, used for calculating the number of modulation symbols when three UCI types are respectively configured and mapped to PUSCH for transmissionDenoted as β ₁、β₂ and β ₃, respectively, α may be the ratio of β ₂ and β ₃ to β ₁, α=β ₂/β₁,β＝β₃/β₁. Next, the uplink transmission power f (N) =f (N ₁+αN₂+βN₃+N_CRC) may be calculated with the equivalent total number of bits N according to the power control formula f (N ₁) of the UCI of the first type. When only two of the three UCI classifications exist for the current subframe, it is possible to still calculate according to the above formula and set the number of bits of the non-existing UCI classification to 0. Or when only the second UCI and the third UCI exist, the third UCI may be equivalent to the second UCI, and then the equivalent total number of bits m=n ₂+γN₃, and then the uplink transmission power g (M) =g (N ₂+γN₃+N_CRC) may be calculated according to the power control formula g (N ₂) of the second UCI. Gamma is a coefficient that equates the third type UCI to the second type UCI, and gamma may be configured with higher layer signaling or predefined. In particular, γ may be calculated based on α and β, e.g., γ=β/α=β ₃/β₂.

The second method is that firstly, for the first UCI, the uplink transmission power needed when only the UCI is fed back on the PUCCH format Y is calculated according to the bit number, and the uplink transmission power is recorded as f (N ₁); next, f (N ₁) is weighted according to the number of bits and performance requirements of each UCI class to be fed back by the current subframe to obtain the actual transmit power required by the UE. Here, the transmission power of the UE may be calculated using the method of processing transmission power control based on, for example, equation 1), 2), 3), 5), or 6) in embodiment one. For example, assuming that UCI of PUCCH format Y is divided into two categories, the UE total transmission power may be f (N ₁+N_CRC)·(1+α(N₁,N₂)); or assuming that UCI of PUCCH format Y is divided into three categories, the UE total transmission power is f (N ₁+N_CRC)·(1+α(N₁,N₂)+β(N₁,N₃)) when UCI of the three categories all exist. Where α (N ₁,N₂) and β (N ₁,N₃) are ratios of transmission powers of the second and third types of UCI to the first type of UCI, and their functional forms are related to the number of bits and performance requirements of the UCI of each category, and the present invention is not limited to the functional forms of α (N ₁,N₂) and β (N ₁,N₃). One possible method is to calculate the above equivalent coefficients α (N ₁,N₂) and β (N ₁,N₃) from the number of modulation symbols allocated by UCI of different classes. Taking alpha (N ₁,N₂) as an example, it is assumed that the number of modulation symbols obtained by allocation of the first UCI type and the second UCI type is respectivelyAnd/>The equivalent coefficient may beWhen only two of the three UCI classifications exist for the current subframe, the transmission power of the non-existing UCI classification may still be calculated according to the above formula and set to 0. Or when only the second type UCI and the third type UCI exist, the third type UCI may be equivalent to the second type UCI, and the UE total transmission power is g (N ₂)·(1+γ(N₂,N₃)), where γ (N ₂,N₃) is a ratio of the transmission power of the third type UCI to the second type UCI, and γ (N ₂,N₃) may be configured with higher layer signaling or predefined. In particular, γ (N ₂,N₃) may be calculated based on α (N ₁,N₂) and β (N ₁,N₃), for example, γ (N ₂,N₃)＝β(N₁,N₃)/α(N₁,N₂).

The third method is to base the number of bits N _m of one type of UCI m and the number of modulation symbols actually used for transmitting UCI m on the PUCCH format Y channel on multiple classified UCIs to be fed back currentlyTo calculate the uplink transmission power of the UE. Here,/>And the total number of modulation symbols N _RE which are less than or equal to the PUCCH format Y channel and can be used for bearing UCI m. UCI m may be a predefined UCI type or a UCI type configured with higher layer signaling. Or UCI m may refer to a UCI type with highest reliability requirements, such as HARQ-ACK, so as to directly guarantee its transmission performance. Or UCI m may also refer to a UCI type with the lowest reliability requirement, for example, CQI/PMI, and if UCI with high reliability requirement is preferentially considered when a modulation symbol of PUCCH format Y is allocated, the ratio of REs allocated by the UCI type with the lowest reliability requirement is smaller, so that the performance requirements of other UCI types are also satisfied at the same time under the condition that the performance requirements of the UCI type with the lowest reliability requirement are guaranteed. For example, based on equation 5) in embodiment one, parameter/>Can be determined according to the number of bits of UCI m and the number of modulation symbols occupied by the UCI m, namely/>And adopts the parameters corresponding to UCI mHere, the BPRE is proportional to the actual coding rate of UCI m, so that the BPRE and Δ _TF,c (i) calculated by the above method can completely match the performance requirement of UCI m. Assuming that the UCI requiring feedback of multiple classifications is currently a modulation symbol dividing PUCCH format Y according to its performance requirement, for example, according to the number of bits of various UCI and/>, of various UCIAnd when the modulation symbols are allocated by the parameters, the performance of UCI m can be ensured by adopting the power control method, and the performance requirements of other UCIs can be ensured at the same time.

Based on the first, second and third methods described above, the calculated total uplink transmission power may also be different for the UCI of the multiple classifications fed back in one subframe when they are equivalent to UCI of different classifications. Thus, the fourth method is to select uplink transmission powers after the equivalent are calculated by different equivalent methods, respectively, and take the maximum value of the calculated uplink transmission powers as the actual uplink transmission power of the UE. For example, for the first method, let the transmission power equivalent to UCI of the first type be f (N) =f (N ₁+αN₂+βN₃+N_CRC), the transmission power equivalent to UCI of the second type be g (P) =g (N ₂+α₂N₁+β₂N₃+N_CRC), and the transmission power equivalent to UCI of the third type be z (Q) =z (N ₃+α₃N₁+β₃N₂+N_CRC), the uplink transmission power of the UE may be max [ f (N), g (P), z (Q) ]. The above functions f (x), g (x), and z (x) represent functional forms when only UCI of the first, second, and third classes is transmitted, respectively, and they may be the same or different.

The fifth method is to calculate the uplink transmission power needed when only the UCI of this type is fed back on the PUCCH format Y according to the number of bits of each sorting UCI, and then sum the uplink transmission powers of the UCI types needed to be fed back in the current subframe to obtain the total transmission power of the UCI information transmitted by the UE. Here, the transmission power corresponding to each type UCI may be calculated separately using the method based on the processing of transmission power control in embodiment one, for example, formulas 1), 2), 3), 5), or 6). For example, in the case of processing two types of UCI, if transmission power required to transmit only each type of UCI is f (N ₁+N_CRC) and g (N ₂+N_CRC), respectively, the UE transmits the total transmission power of the two types of UCI as f (N ₁+N_CRC)+g(N₂+N_CRC), assuming that CRCs of the same length are added to the two types of UCI. Or for the case of processing three types of UCI, it is noted that only transmission power required for transmitting each type of UCI is +n _CRC、g(N₂+N_CRC and z (N ₃+N_CRC), respectively, and then the total transmission power of UE transmitting three types of UCI information is f (N ₁+N_CRC)+g(N₂+N_CRC)+z(N₃+N_CRC), which is assumed that CRCs of the same length are added to the three types of UCI.

The sixth method is to perform power control according to the total number of bits of UCI, although UCI of different classes is separately encoded, rate-matched, and mapped. Here, the transmission power of the UE may be calculated using the method of processing transmission power control based on, for example, equation 1), 2), 3), 5), or 6) in embodiment one. For example, according to a power control formula of the UCI type with the highest reliability requirement, the uplink transmission power is calculated according to the total number of UCI bits. By adopting the method, the transmission power is set quite conservatively according to the total bits of UCI, and because the UCI is independently coded and mapped according to the requirements of different UCIs, the situation that too much power is consumed on the UCI with low reliability requirements is further avoided, so that the performance of UCI transmission is improved.

A seventh method is to assume that UCI is divided into three categories and each category is separately encoded and mapped to a PUCCH format Y channel. In processing power control, however, multiple classifications may be processed together in terms of their total number of bits. Here, the transmission power of the UE may be calculated using the method of processing transmission power control based on, for example, equation 1), 2), 3), 5), or 6) in embodiment one. For example, HARQ-ACK is used as one UCI, first CSI is used as one UCI, second CSI is used as another UCI, and then HARQ-ACK and first CSI are independently coded and mapped, but because their performance requirements are close, they can still be processed together when power control is processed, i.e. uplink transmission power is calculated together with second CSI according to the total number of bits of HARQ-ACK and first CSI.

The above method for classifying UCI and separately encoding, rate matching and mapping UCI of different classes needs to adjust the number of modulation symbols occupied on PUCCH format Y channel according to the number of bits of each UCI. In some cases, it may occur that the actual coding rate of a certain type of UCI is particularly high, which is detrimental to ensuring the performance of UCI. Therefore, the present invention proposes that, for the method of mapping independent codes, according to the method of determining the number of modulation symbols of different UCI classifications, if the coding rate of one UCI appears to be particularly high, independent codes are abandoned in this case; that is, all UCI bits are jointly encoded and mapped to PUCCH format Y transmission; otherwise, UCI transmission is processed according to the independent coding mapping method.

Example III

Within one subframe, the UE may have a plurality of PUCCH formats for transmitting UCI. For example, PUCCH format 2 may carry P-CSI of up to 11 bits, PUCCH format 3 may carry UCI information of no more than 22 bits, and PUCCH format X may carry UCI information of more bits. The UE, in particular, which PUCCH format is used to transmit UCI information, depends on the configuration of the base station. In particular, for P-CSI, only feedback of P-CSI with PUCCH format 2 is supported until LTE release 12. In practice, PUCCH format 3 is possible for feeding back P-CSI, supporting up to 22 bits; PUCCH format X is also possible for feeding back P-CSI, supporting a larger number of bits. In summary, there are a variety of PUCCH formats that may be used for transmitting P-CSI. For one PUCCH format X channel, the number of PRBs occupied may be one or more.

According to the existing LTE specification, when P-CSI transmission of UE is configured, transmission modes 1-9 are respectively configured with the period, subframe offset and PUCCH resource index of the P-CSI of each cell; if the UE configures two CSI subframe sets, it may be to configure a period of P-CSI and a subframe offset for each subframe set, respectively, but one cell configures only one PUCCH resource index. Transmission mode 10, supporting configuration periods and subframe offsets for P-CSI for each CSI process, respectively; for the CSI process configured with two CSI subframe sets, a period for configuring P-CSI and subframe offset can be allocated to each subframe set; but only one PUCCH resource index is configured for all CSI process/CSI subframe sets of the same cell. Here, although only one PUCCH resource index is configured, since the periodicity and/or offset of the P-CSI of different CSI process/CSI subframe sets may be different, the P-CSI of different CSI process/CSI subframe sets may be fed back with the one PUCCH resource index corresponding to the PUCCH channel within different subframes.

According to the existing LTE specifications, when multiple P-CSI information needs to be transmitted in one subframe, the UE only transmits one P-CSI with the highest priority according to the priority processing of the P-CSI, and directly discards all other P-CSI with low priority. Here, the highest priority P-CSI is transmitted on the PUCCH channel corresponding to the P-CSI. To improve the opportunity for P-CSI feedback, P-CSI for multiple sets of cells/CSI processes/CSI subframes may be supported for simultaneous feedback within one subframe. For example, when the number of cells configuring the UE is larger, the P-CSI that the UE needs to feed back is correspondingly increased, so that the probability that the P-CSI of multiple cells/CSI processes/CSI subframe sets needs to be fed back in the same subframe is also increased, and in order to avoid frequent P-CSI dropping operation, the P-CSI that multiple cells/CSI processes/CSI subframe sets need to be fed back simultaneously can be supported.

Specifically, assuming that P-CSI of N cell/CSI process/CSI subframe sets is configured in one subframe, but a PUCCH channel for P-CSI may not be sufficient to carry all N P-CSI, a certain priority criterion is required to select M from N P-CSI, where M is less than or equal to N, and the selected M P-CSI may be transmitted on the PUCCH channel. Corresponding to the N P-CSI, a plurality of different PUCCH resources may be configured in one subframe.

The method for determining M P-CSI which can be carried in the subframe is that firstly, the bit number which can be carried by the PUCCH resources corresponding to the P-CSI of the N cell/CSI process/CSI subframe sets is determined, and M P-CSI is selected according to the maximum value N _max of the bit numbers which can be carried by each PUCCH resource. For example, M highest priority P-CSI are selected and the total number of bits is N _max or less. Here, if the HARQ-ACK is also required to be transmitted in the current subframe, the M highest priority P-CSI may be selected and the sum of the total number of bits and the number of HARQ-ACK bits to be fed back in the current subframe may be N _max or less. The invention is not limited to using other methods to select M P-CSI from the N P-CSI for feedback.

From the above analysis, assuming that N P-CSI are configured on one subframe and there may be a plurality of PUCCH resources correspondingly, the method of configuring PUCCH resources corresponding to P-CSI of the present invention is described below.

The first method is to allocate one PUCCH resource, including a PUCCH format and a PUCCH resource index, to each cell of the UE, and further restrict PUCCH channels for P-CSI configured for the respective cells to be all of the same PUCCH format. Or the PUCCH channels for P-CSI configured for each cell are restricted to be the same PUCCH format, and this PUCCH format for P-CSI transmission may be configured or predefined with higher layer signaling, so that it is not necessary to configure each cell separately; and one PUCCH resource index corresponding to the above PUCCH format is allocated to each cell, so that PUCCH resource indexes configured by different cells may be different. The number of PRBs occupied by different PUCCH resources may be the same for PUCCH format X, or may be different. Here, it is still restricted to configure the same PUCCH format for multiple CSI-process/CSI subframe sets of one cell.

As described above, there are a variety of PUCCH formats that can be used to transmit P-CSI, and the number of bits that they carry can be different. The number of P-CSI that need to feed back the cell/CSI process/CSI subframe set at the same time may be different on different subframes, and correspondingly, the optimal PUCCH format for P-CSI transmission may be different. Here, an optimization method is to use as low as possible a PUCCH format with a low number of bearer bits on the premise of being able to bear the selected M P-CSI for one subframe, that is, PUCCH format 2 is preferably adopted, PUCCH format 3 is then followed, and PUCCH format X is finally used. For PUCCH format 2 and PUCCH format 3, a plurality of channels of such PUCCH formats may be multiplexed within one PRB, thereby improving resource utilization. Accordingly, a method of configuring different PUCCH formats for P-CSI needs to be supported on different subframes. However, the first method only supports configuring the same PUCCH format on different subframes, thereby limiting the link performance and resource utilization of the P-CSI.

The second method is to allocate one PUCCH resource, including a PUCCH format and a PUCCH resource index, to each cell of the UE, but it is not limited that PUCCH channels for P-CSI configured by the respective cells can only be the same PUCCH format. That is, when N P-CSI configured within one subframe correspond to a plurality of cells, the P-CSI may correspond to a plurality of PUCCH formats and PUCCH resource indexes thereof, for example, PUCCH format 2, format 3, and/or format X. The number of PRBs occupied by different PUCCH resources may be the same for PUCCH format X, or may be different. Here, it is still restricted to configure the same PUCCH format for multiple CSI-process/CSI subframe sets of one cell.

By adopting the second method, the same PUCCH resource is adopted for the P-CSI of each CSI process/CSI subframe set of a cell. However, because different PUCCH resources are supported to be configured for different cells, by coordinating the P-CSI period and the subframe offset of each cell and combining a certain priority strategy to select the PUCCH resources used for P-CSI transmission in one subframe, resources occupying different PUCCH formats on different subframes can still be realized to transmit P-CSI. For example, the method for selecting the PUCCH resource for actually transmitting P-CSI may be to select, for one subframe, a PUCCH resource with a low capability of bearing bits from a plurality of PUCCH resources configured for P-CSI transmission on the premise that the selected M P-CSI can be borne. However, since one cell can still only configure one PUCCH resource, this method limits flexibility of configuring PUCCH resources by the base station to some extent.

The third method is to configure one PUCCH resource for each CSI process/CSI subframe set of each cell of the UE, including a PUCCH format and a PUCCH resource index, respectively, and restrict PUCCH channels of respective P-CSI configured in the same subframe to be the same PUCCH format.

The fourth method is to configure one PUCCH resource, including a PUCCH format and a PUCCH resource index, for each CSI process/CSI subframe set of each cell of the UE, respectively, and PUCCH channels of respective P-CSI configured in the same subframe may be configured with different PUCCH formats.

For the third and fourth methods, for one cell, it may be supported to configure PUCCH resources for each CSI process separately; or configuring PUCCH resources for each CSI subframe set respectively; or separately configuring PUCCH resources for each (CSI process, CSI subframe set) combination. Here, for one cell, since the periodicity and subframe offset of the configuration of different CSI processes/CSI subframe sets are generally different, it is achieved that different PUCCH formats for P-CSI transmission are configured within different subframes.

A fifth method is to configure PUCCH resources for P-CSI of different formats on different subframes for one cell of the UE, including PUCCH format and PUCCH resource index, but restrict P-CSI of each cell within one subframe to configure the same PUCCH format. For example, the PUCCH format and PUCCH resource index employed for each subframe in one period may be configured with a period T, which is a constant, respectively.

A sixth method is to configure PUCCH resources for P-CSI of different formats, including PUCCH format and PUCCH resource index, on different subframes for one cell of the UE, and P-CSI of each cell procedure may configure different PUCCH formats within one subframe. For example, PUCCH formats used for each subframe in one period may be respectively configured with a period T, which is a constant.

Based on the six methods for configuring the PUCCH resources corresponding to the P-CSI, one or more PUCCH resources may be additionally configured for the UE by using higher layer signaling, and include the PUCCH format and the PUCCH resource index thereof, respectively. Here, the additionally configured PUCCH resources may be different from PUCCH resources configured based on the above six methods. Also, if multiple additional PUCCH resources are configured, their PUCCH formats may be configured differently, e.g., PUCCH format 3 and PUCCH format X; or the number of PRBs occupied by the same PUCCH format may be different. In this way, the above method configures resources of a plurality of PUCCH formats for the UE within one subframe, so that the UE can select the most suitable PUCCH resource for P-CSI transmission. The configuration information of these additional PUCCH resources may be P-CSI that is applicable to each cell/CSI process/CSI subframe of the UE only once, but need not be repeatedly transmitted for each set of cells/CSI processes/CSI subframes of the UE; or the method of configuring the PUCCH resources corresponding to the P-CSI can be directly expanded, namely, each cell of the UE can be configured with one or more additional PUCCH resources, so that the P-CSI of all CSI processes/CSI subframe sets applied to the cell can be directly expanded; or additional one or more PUCCH resources may be configured for each cell/CSI process/CSI subframe set. Thus, for one subframe, each P-CSI correspondingly configured may be configured with a plurality of different PUCCH resources, and correspondingly, for N P-CSI in this subframe, a plurality of different PUCCH resources are also configured, and the UE needs to select the PUCCH resource actually used for P-CSI transmission.

For example, based on the first method, when configuring P-CSI of one cell, PUCCH resources for P-CSI configured by each cell are restricted to be the same PUCCH format. This PUCCH format may be configured to the UE with RRC signaling, and may be repeated for each cell of the UE; or may be configured only once without the need to repeatedly send this information for each cell. Or this PUCCH format is predefined, e.g. fixed as PUCCH format 2, i.e. P-CSI supporting only one cell/CSI process/CSI subframe set feedback. And, the structure of the existing RRC signaling configuration P-CSI PUCCH resource is reused as much as possible, and PUCCH resource indexes for P-CSI transmission are respectively configured for each cell of the UE. The above-mentioned resource indexes of different cells may be the same or different. And, one PUCCH resource is additionally configured for the UE using higher layer signaling, and its PUCCH format may be made different from the PUCCH format of the PUCCH resource separately configured for each cell based on the first method described above. Thus, within each subframe, the UE may have two PUCCH formats available for P-CSI transmission. For example, a PUCCH format configured according to the first method described above is predefined as PUCCH format 2, and an additional one PUCCH format 3 resource is configured. Or additionally configuring a plurality of PUCCH resources for the UE with higher layer signaling, and the formats of the plurality of additional PUCCH resources may be configured differently. The above-described additionally configured PUCCH format may be different from the PUCCH format of the PUCCH resource separately configured for each cell based on the above-described first method. When PUCCH resources of a plurality of PUCCH formats X are additionally configured, the number of PRBs thereof may be the same or different. Or, a plurality of PUCCH resources are additionally configured for the UE by using higher layer signaling, and the plurality of additional PUCCH resources are all PUCCH format X, but the number of PRBs occupied by the PUCCH resources may be different. The UE may select an appropriate PUCCH format according to the total number of bits of the P-CSI that the current subframe needs to feed back, and determine the PUCCH resource index accordingly. For example, it may be to select a PUCCH format that can carry P-CSI requiring feedback and can carry a relatively small number of bits, thereby improving resource utilization.

In one subframe, it is assumed that P-CSI of N cell/CSI process/CSI subframe sets is configured, and that a plurality of PUCCH channels for P-CSI transmission are all of the same PUCCH format, but may correspond to a plurality of different PUCCH resource indexes.

In this case, the UE may transmit the selected M P-CSI using a PUCCH channel of one of the plurality of PUCCH resource indexes. For example, the PUCCH resource index used by the UE to transmit P-CSI may be a PUCCH resource index configured corresponding to the P-CSI of the priority among the N P-CSI. Or the PUCCH resource index used by the UE to transmit the P-CSI may be the PUCCH resource index configured corresponding to the P-CSI of the priority among the above-mentioned selected M P-CSI. Or the PUCCH resource index used by the UE to transmit the P-CSI may be the smallest resource index among the plurality of PUCCH resource indexes corresponding to the N P-CSI. Or the PUCCH resource index used by the UE to transmit the P-CSI may be the smallest resource index among the plurality of PUCCH resource indexes corresponding to the M selected P-CSI.

In this case, assuming that the UE has the capability of uplink multi-antenna transmission, P-CSI of N cells/CSI processes is configured in one subframe through higher layer signaling, and at least two PUCCH resource indexes are correspondingly configured; or configuring at least two PUCCH resource indexes correspondingly for the selected M P-CSI; the UE may transmit the selected M P-CSI using PUCCH channels corresponding to the two PUCCH resource indexes, thereby obtaining the effect of transmit diversity.

On one subframe, it is assumed that P-CSI of N cell/CSI subframe set procedures is configured, and it is assumed that PUCCH channels for P-CSI transmission may employ different PUCCH formats and PUCCH resource indexes. The plurality of PUCCH resources may be obtained by the 2 nd to 6 th methods of configuring PUCCH resources corresponding to P-CSI; or, the six methods for configuring the PUCCH resources corresponding to the P-CSI may be used for allocation, and one or more PUCCH resources may be additionally allocated.

In this case, the UE may transmit the selected M P-CSI using one of the above-described plurality of PUCCH resources. For example, the PUCCH resource used by the UE for transmitting P-CSI may correspond to the PUCCH resource configured by the P-CSI with the highest priority among the N P-CSI; if there are multiple PUCCH resources, one of them may be used, for example, the smallest PUCCH resource index. Or the PUCCH resource used by the UE for transmitting the P-CSI may correspond to the PUCCH resource configured by the P-CSI with the highest priority among the above-mentioned selected M P-CSI; if there are multiple PUCCH resources, one of them may be used, for example, the smallest PUCCH resource index. Or the PUCCH resource used by the UE for transmitting the P-CSI may be one PUCCH resource with the largest number of bearer bits among the N PUCCH resources configured by the P-CSI, and if there are multiple PUCCH resources with the largest bearer capability, one of them may be used, for example, the PUCCH resource with the highest priority of the P-CSI corresponding thereto or the PUCCH resource index thereof is the smallest. Or the PUCCH resource used by the UE for transmitting the P-CSI may be one PUCCH resource with the largest number of bearer bits among the above-mentioned selected M PUCCH resources configured by the P-CSI, and if there are multiple PUCCH resources with the largest bearer capability, one of them may be used, for example, the PUCCH resource with the highest priority of the P-CSI corresponding thereto or the PUCCH resource index thereof is the smallest. Or the PUCCH resource used by the UE for transmitting the P-CSI may be one PUCCH resource capable of carrying the M selected P-CSI and having the smallest number of bits, and if there are multiple PUCCH resources having the smallest carrying capacity, one of them may be used, for example, the PUCCH resource having the highest priority of its corresponding P-CSI, or its PUCCH resource index is the smallest. Here, if the HARQ-ACK needs to be transmitted in the current subframe, it is also possible to select one PUCCH resource capable of carrying the M selected P-CSI and the HARQ-ACK to be fed back and having the smallest number of bits from among the N P-CSI configured PUCCH resources. Or the PUCCH resource used by the UE for transmitting the P-CSI may be one PUCCH resource capable of carrying the M selected P-CSI and having the smallest number of bits, and if there are multiple PUCCH resources having the smallest carrying capacity, one of them may be used, for example, the PUCCH resource having the highest priority of its corresponding P-CSI or the PUCCH resource index thereof is the smallest. Here, if the HARQ-ACK needs to be transmitted in the current subframe, one PUCCH resource capable of carrying the M selected P-CSI and the HARQ-ACK to be fed back and having the smallest number of bits may be selected from the selected M P-CSI configured PUCCH resources.

In this case, assuming that the UE has the capability of uplink multi-antenna transmission, P-CSI of N cells/CSI processes is configured in one subframe through higher layer signaling, and at least two PUCCH resources are correspondingly configured; or at least two PUCCH resources are configured corresponding to the selected M P-CSI, the UE can transmit the selected M P-CSI by utilizing the two PUCCH resources, so that the effect of transmit diversity is obtained. Here, it may be further restricted that two PUCCH resources for transmitting P-CSI by the UE are necessarily channel resources of the same PUCCH format.

A seventh method is to configure PUCCH resources for P-CSI employed for each subframe in one period, including PUCCH format and PUCCH resource index, for one UE, respectively, with period T, where T is a constant. This signaling may be sent only once, i.e. not repeated for each cell/CSI process/CSI subframe set of the UE. With this method, only one PUCCH resource for P-CSI transmission is configured on each subframe, so that the UE transmits P-CSI on this PUCCH resource.

In the embodiment of the invention, the maximum value of the uplink transmission power is obtained according to different equivalent methods and is used as the actual uplink transmission power of the UE.

Based on the analysis, the invention also provides a device for transmitting the uplink control information.

Fig. 4 is a block diagram of an apparatus for transmitting uplink control information according to the present invention, where the apparatus 400 is applied to a UE, and the apparatus includes:

A configuration information receiving module 401, configured to receive configuration information of uplink control information UCI, including determining a P-CSI period, an offset, and a corresponding physical uplink control channel PUCCH to be fed back in one subframe, and further including configuration information of HARQ-ACK transmission;

The UCI information transmission module 402 is configured to process one or more UCI information in one subframe, and transmit the UCI information on a PUCCH format resource.

The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather to enable any modification, equivalent replacement, improvement or the like to be made within the spirit and principles of the invention.

Claims

1. A method performed by a terminal in a communication system, the method comprising:

Receiving configuration information of one or more Physical Uplink Control Channel (PUCCH) resources from a base station, wherein the configuration information is used for transmitting a plurality of Channel State Information (CSI), and the configuration information comprises indexes of the one or more PUCCH resources;

Determining an index of a PUCCH resource for transmitting UCI including the plurality of CSI among the one or more PUCCH resources based on the number of bits for uplink control information UCI;

determining a power for transmitting UCI based on the number of physical resource blocks PRB corresponding to PUCCH resources and the number of bits for UCI; and

Based on the power for transmitting UCI, UCI including the plurality of CSI is transmitted using PUCCH resources having the determined index.

2. The method of claim 1, wherein the configuration information further comprises PUCCH formats of the one or more PUCCH resources.

3. The method of claim 1, wherein the determined index is an index of a PUCCH resource corresponding to a number of bits of the one or more PUCCH resources, the number of bits being a minimum number greater than or equal to a number of bits for UCI.

4. A method as claimed in any one of claims 1 to 3, further comprising:

selecting at least one CSI among the plurality of CSI based on a priority value in case that the number of bits for UCI is greater than a maximum number of bits corresponding to the one or more PUCCH resources; and

The UCI including the selected at least one CSI is transmitted using a PUCCH resource corresponding to the maximum number of bits.

5. The method of claim 1, wherein the power for transmitting UCI is determined based on a ratio of a number of bits for UCI to a number of resource elements of the UCI.

6. A method performed by a base station in a communication system, the method comprising:

transmitting configuration information of one or more Physical Uplink Control Channel (PUCCH) resources to a terminal, wherein the configuration information is used for transmitting a plurality of Channel State Information (CSI), and the configuration information comprises indexes of the one or more PUCCH resources; and

Based on the power used to transmit the uplink control information UCI, the UCI including the plurality of CSI is received using PUCCH resources having the determined index,

Wherein the index of the PUCCH resource for receiving UCI including the plurality of CSI is determined among the one or more PUCCH resources based on the number of bits for UCI, and

Wherein the power for transmitting UCI is determined based on the number of physical resource blocks PRB corresponding to PUCCH resources and the number of bits for UCI.

7. The method of claim 6, wherein the configuration information further comprises PUCCH formats of the one or more PUCCH resources.

8. The method of claim 6, wherein the determined index is an index of a PUCCH resource corresponding to a number of bits, the number of bits being a minimum number greater than or equal to a number of bits for UCI, of the one or more PUCCH resources.

9. The method of any of claims 6-8, further comprising receiving UCI including the selected at least one CSI using PUCCH resources corresponding to the maximum number of bits,

Wherein the at least one CSI is selected among the plurality of CSI based on a priority value in case that the number of bits for UCI is greater than a maximum number of bits corresponding to the one or more PUCCH resources.

10. The method of claim 6, wherein the power for transmitting UCI is determined based on a ratio of a number of bits for UCI to a number of resource elements of the UCI.

11. A terminal in a communication system, the terminal comprising:

A transceiver; and

A controller configured to:

12. The terminal of claim 11, wherein the configuration information further comprises PUCCH formats of the one or more PUCCH resources.

13. The terminal of claim 11, wherein the determined index is an index of a PUCCH resource corresponding to a number of bits, among the one or more PUCCH resources, that is a minimum number greater than or equal to a number of bits for UCI.

14. The terminal of any of claims 11-13, wherein the controller is further configured to:

15. The terminal of claim 11, wherein the power for transmitting UCI is determined based on a ratio of a number of bits for UCI to a number of resource elements of the UCI.

16. A base station in a communication system, the base station comprising:

A transceiver; and

A controller configured to:

17. The base station of claim 16, wherein the configuration information further comprises PUCCH formats of the one or more PUCCH resources.

18. The base station of claim 16, wherein the determined index is an index of a PUCCH resource corresponding to a number of bits of the one or more PUCCH resources, the number of bits being a minimum number greater than or equal to a number of bits for UCI.

19. The base station of any of claims 16-18, wherein the controller is further configured to receive UCI including the selected at least one CSI using PUCCH resources corresponding to a maximum number of bits,

20. The base station of claim 16, wherein the power for transmitting UCI is determined based on a ratio of a number of bits for UCI to a number of resource elements of the UCI.